a === b -> identical(a, b)

tests/compiler/dart2js/compiler_test.dart

Index: tests/compiler/dart2js/compiler_test.dart
diff --git a/tests/compiler/dart2js/compiler_test.dart b/tests/compiler/dart2js/compiler_test.dart
index aa55ebae3ae85c2707c36c89b09d74ce32bb04ae..642f7bea90ce3e1c87d4154cebd848a3c6ad90cc 100644
--- a/tests/compiler/dart2js/compiler_test.dart
+++ b/tests/compiler/dart2js/compiler_test.dart
@@ -20,12 +20,12 @@ class CallbackMockCompiler extends MockCompiler {
   setOnWarning(var f) => onWarning = f;
 
   void reportWarning(Node node, var message) {
-    if (onWarning !== null) onWarning(this, node, message);
+    if (onWarning != null) onWarning(this, node, message);
     super.reportWarning(node, message);
   }
 
   void reportError(Node node, var message) {
-    if (onError !== null) onError(this, node, message);
+    if (onError != null) onError(this, node, message);
     super.reportError(node, message);
   }
 }